RTC 3.0 Build - multi platform environment

I would like to create a multi-platform build, say, Windows and Linux. I can define for each platform separate build definition and engine. The problem is that both builds work separately. There is no guarantee that they will be based on the same version of the source code, since each one will have its own snapshot. It can happen even if build requests for both builds will be issued simultaneously. Can I define such build the way they do in Hudson (www.hudson.org)? Hudson allows me to define various build steps and their dependencies. With Hudson we can define the whole build -deploy -test steps.


Thanks,

Yaron